US3420812A - Disazo dyestuffs metal-complex - Google Patents

Disazo dyestuffs metal-complex Download PDF

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Publication number
US3420812A
US3420812A US3420812DA US3420812A US 3420812 A US3420812 A US 3420812A US 3420812D A US3420812D A US 3420812DA US 3420812 A US3420812 A US 3420812A
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US
United States
Prior art keywords
parts
brown
acid
water
dyestuff
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Gerhard Langbein
Fritz Meininger
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Hoechst AG
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Hoechst AG
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Publication date
Priority to DEF0042863 priority Critical
Application filed by Hoechst AG filed Critical Hoechst AG
Application granted granted Critical
Publication of US3420812A publication Critical patent/US3420812A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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